Question

Need Help?

Find 2r2 + 3s3 - r2 + 4t2 - r2 if r = -2, s = -3, and t = 5.
Somehow I came up with 489, but the choices are:
-19

-37

27

19

Answer 1

so it would bee
2(-2)2+3(-3)3-2(-2)+4(5)2-4(-2)?
o-o

Answer 2

yes but than I need to solve the equation.. @helppls123

Answer 3

okay gimme a sec lemme try this

Answer 4

okay thanks

Answer 5

im not good at math at all sorry

Answer 6

uhm i got 17 ;o lemme try it a different way

Answer 7

okay thanks for tryinggg @helppls123

Answer 8

yeah this time i got 16 xD I'm not sure what i'm doing wrong. Sorry I couldn't be more of help (: